I assume you are using Apple's Mail for e-mail. I don't use that myself, but I can tell you one way that I think will work. Maybe someone else knows a more sophisticated method using Mail. (See! ....next post!)
As you probably know, the way to hide recipients from one another is by using "Bcc", blind carbon copy. So, to use that regularly with the same group of addresses, leave one out of the Group. Send your message To the address you left out of the Group, and "Bcc" the Group.
Now, if somebody knows that this will not work, please chime in. I'll get to learn something too.
Last edited by Gregg; 08/10/09 12:28 AM.